利用1∶50000高程数据进行ASTER DEM异常修复研究

Research on Fixing ASTER DEM Data Anomaly by Using 1∶50 000 Elevation Data

覆盖近乎全球的30 m ASTER DEM已经对公众开放,为研究全球尺度问题提供了较好的数据基础,但其数据精度和质量在我国区域内存在较多不确定性。研究了利用全国1∶50000高程数据对ASTER DEM数据异常进行修补的技术路线,从而为实现利用多源DEM数据更新现有数据提供质量与可靠性保证,也为我国构建全球基础DEM数据库提供了一种有效的参考。

30 m ASTER DEM which overlays almost of the whole global area has been already openned to the public,it has provided a better data foundation to study the problem of the global dimensions, but its data accuracy and quality have more indetermination in our country. This paper studies the technique route of fixing the data anomaly of the ASTER DEM by use of 1 ： 50 000 elevation data base, which provides a credible method and qualified control for using the diverse DEM data to renew the existing data, and it also provides an efficient reference to constructing the global foundation DEM database of our country.